(19)

(11)

EP 1 504 234 A2

(12)

(88) Date of publication A3: 18.11.2004 (43) Date of publication: 09.02.2005 Bulletin 2005/06 (21) Application number: 02739618.3 (22) Date of filing: 04.06.2002

(51) International Patent Classification (IPC)7: F42B 12/60 (86) International application number: PCT/US2002/017429 (87) International publication number: WO 2002/099355 (12.12.2002 Gazette 2002/50)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 04.06.2001 US 295731 P 23.08.2001 US 938022 (71) Applicant: Raytheon Company Waltham,Massachusetts 02451-1449 (US)	(72) Inventor: LLOYD, Richard, M. Melrose, MA 02176 (US) (74) Representative: Jones, Graham H.  Graham Jones & CompanyBlackheath77 Beaconsfield Road London SE3 7LG London SE3 7LG (GB)